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Triathlon Calendar near Riverside 2026-2027

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Explore the top triathlons near Riverside for 2026-2027! We've gathered 4 exciting races in the area. Check out our detailed list below to find your next local race.

September 2026
Sep
13
Su

Millstadt Parks Biathlon

Duathlon Individual Biathlon 5 22 mi Team Biathlon - Male 5 22 mi Team Biathlon - Female 5 22 mi Team Biathlon - Co-Ed 5 22 mi
Community biathlon and 5K in Millstadt featuring a 5 mile run and 22 mile bike, age and team awards, post-race food and yoga, proceeds to the park fund.
December 2026
Dec
5
Sa

Castlewood Adventure Race

Multisport 8 HOUR ADVENTURE RACE - S... 5 15 5 mi 8 HOUR ADVENTURE RACE - 2... 5 15 5 mi 8 HOUR ADVENTURE RACE - 3... 5 15 5 mi 8 HOUR ADVENTURE RACE - 4... 5 15 5 mi
An 8 hour off road navigation race around St. Louis combining canoeing, mountain biking and trekking with solo and team divisions.
June 2027
Jun
1
Tu

St. Louis Triathlon

Triathlon Duathlon Aquathlon Sprint 750 m 5 km Olympic 1 mi 10 km Sprint 750 m 20 km Sprint 750 m 20 5 km
Experience Missouri’s premier multi-sport showdown at Creve Coeur Park with triathlon, duathlon, and aquathlon races for all athletes including a USAT State Championship.
July 2027
Jul
1
Th

Ballwin Triathlon

Triathlon Sprint 300 m 9 3.4 mi Ballwin Double 300 m 9 3.4 mi 1 m 9 3.4 mi
A USAT sanctioned pool triathlon in Ballwin on July 19, 2026 with 300 yard swim, 9 mile bike and 3.4 mile run plus single, relay and double options.
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